Warper stop motion



I May 27 1924.

D. A. FORTUNE WARPER STOP MOTION Filed Sent. 11, 1922 2 Shasta-Sheet lMay 27 1924. D. A. FORTUNE WARPER STOP MOTION Filed Sept. 1-1 1922 2Shoots-Sheet 2 Patented May 27, 1924.

UNITED STATES PATENT OFFICE.

DAVID A. FORTUNE, F METHUEN, MASSACHUSETTS, ASSIGNOR T0 CROMPTON &

KNOXVLES LOOM WORKS, A CORPORATION OF MASSACHUSETTS.

WARPER, STOP MOTION.

Application filed. September 11, 1922.

To all whom it may concern:

Be it known that I, DAVID A. FORTUNE, a citizen of the United States,residing at Methuen, in the county of Essex and State of Massachusetts,have invented a new and useful )Varper Stop Motion, of which thefollowing is a specification.

This invention relates to means for stopping a warper upon the breakageof one or more of the warp threads. When a warper is stopped for this orany other reason, the spools in the creel do not stop simultaneouslywith the warp beam but continue to revolve sufficiently to slacken manyof the warp threads. Then the warper is again started in operation, thedrop wires associated with these slackened threads are thus below theirproper running position.

It is the object of my invention to provide a stop motion for a warperhaving special provision which will permit the machine to be startedslowly after stopping and which will at the same time leave the dropwires free to be raised to running position as the threads aretightened.

My invention further relates to arrangements and combinations of partswhich will be hereinafter described and more particularly pointed out inthe appended claims.

A preferred form of the invention is shown in the drawings, in whichFig. 1 is a side elevation of a warper embodying my improvements;

Fig. 2 is a sectional plan view taken along the line 22 in Fig. 1;

Fig.3 isa sectional side elevation taken along the line 3-3 in Fig. 2:,

Fig; 4 is a detail side elevation of certain parts to be described; v

Fig. 5 is a partial view similar to Fig. 1, but showing the parts in adifferent position; and

Fig. 6 is a detail sectional elevation, taken along the line 66 in Fig.2.

Referring to the drawings, I have shown parts of a warper comprising aframe 10 in which a drum 11 is mounted for rotation, the drum'beingdriven from a shaft 12 through gears 13 and 14. Tight and loose pulleys15 and 16 are mounted on the shaft 12 and are driven by a belt, notshown. The position of the belt is determined by a ship- Serial No.587,347.

per fork 17 mounted on a rod 18 slid-able transversely in the frame 10.

A bell crank 19(Fig. 6) is provided with a forked upper end engaging agrooved collar 20 on the shipperrod 18. .The horizontal arm of the bellcrank 19 has a slot 21 (Fig. 6) through which projects the end of an arm22 (Fig. 2) fixed to a rock shaft 23. The shaft 23 is pivoted inbearings in the lower portion of the frame 10 and is provided with footlevers 2ft and 25, by the depression of which the belt may be shifted tostart the machine.

A latch 26 (Figs. 1 and 5) is pivoted at 27 to the foot lever 2e and isprovided with a shoulder 28 (Fig. 5) in its upper portion adapted toengage a latch plate or bracket 29 fixed to the warper frame. When thusengaged, the latch holds the lever 24: depressed, with the belt on thetight or driving pulley 16.

The drum 11 directly engages the warp threads upon the warp beam WVwhich is held in contact with the drum by arms 30 extending rearwardfrom the frame 10.

The parts thus far described are of the usual construction andthemselves form no part of my present invention.

' The stop motion with which my improvements are embodied herein is ofthe type fully "disclosed in the patent to Holmes, No. 1,360,638, issuedNovember 30, 1920.

' In a stop motion of this type, the drop wires 31 (Fig. 4c) arearranged in banks between guide rods or separator plates 32 (Fig. Eachdrop wire is also provided with an opening having a relatively broadlower portion 33 and a relatively narrow upper portion 34 (Fig. 4).Detector rods 35 extend through the openings in the drop wires and arearranged for regular and repeated oscillating angular movements.

If the drop wires are all held raised by the warp threads, the detectorrods 35 oscillate freely in the wide portions 33 of the openings in thedrop wires and the stop motion remains inoperative. If, however, a dropwire falls, it engages its detector rod in the narrow portion 34 of itsopening, holding the rod from angular movement and causing the actuatingmechanism of the stop motion to stop the machine. This mechanismincludes a rocker arm or actuator 36 pivoted to the frame of the stopmotion and continuously oscillated through a link 37 by an arm 38 havingdriving connections, not shown. A pawl 39 is mounted on an arm orsupport 40 and is moved clear ofa lug or projection 4-1 on the rockerarm 36 so long as thedetector rods 35 are free to move angularly. If,however, such angular movement is prevented, the pawl 39 remains in thepath of the lug 41 and the arm or support 40 is swung about its fixedpivot. This support 40 has a pin and slot connection with a knock-offlever 42 pivoted at 43 on the warper frame and having a dependingportion 44 engaging the upper end of the latch 26.

When the support 40 is swung about its pivot as above described, theknock-off lever 42 is actuated to releaes the latch 26 from the latchplate 29, permitting the rock shaft 23 to be moved by a weight 46 whichis secured thereto. Such movement of the rock shaft actuates the shipperrod to move the belt to the loose' pulley, thus stopping the warper.

The spools in the warper creel, as stated, often continue to revolveafter the drum 11 and warp beam W have come to rest, thus slackening thewarp threads which support the drop wires 31. These wires accordinglyfall and receive'the corresponding detector bars 35in the narrowportions 34 of the openings in the wires.

. As soon as the warper is started, the oscillating mechanism of thestop motion tends to'yieldingly move the detector bars 35 angularly.Such movement would bind the drop wires in their lower position andwould render it difficult to straighten the warp threads and thus raisethe drop wires to run ningposition. Furthermo-re, 1f the warp threadsare drawn through the drop wires when in such lowered position, the pathof the threads is angular and the threads may be frayed or broken if thethread openings in th drop wires should have rough edges.

In order to prevent such binding action by the detector bars 35, I haveprovided a holding bar 47 (Fig. 3) having a lost-motion pin and slotconnection at its lower end to an arm 48 fixed on'the rock shaft 23. Atits upper end, the bar is vertically slidable in a bearing 49 and isforked or slotted at 50, so that the two portions of the fork may passon either side of one of the detector bars 35.

When thus engaged, this detector bar is held from angular movement andthe other detector bars are so connected thereto by links 51, that theyalso are held stationary. The slot 50in the locking bar 47 is ofslightly less width than the detector bar 35, so that the latter isfrictionally engaged by the locking bar .47, which will be held inraised position until positively moved downward.

In the operation of the machine, it is customary for the operator tostart the machine slowly by partially depressing the foot lever 24 or25. The lost-motion connection between the arm 48 and the bar 47 permitssuch partial depression of the foot lever without disengaging the bar 47from its detector bar 35. The detector bars are thus held fromoscillation until the foot lever is fully depressed and the machine isrunning at full speed. Before this point is reached, the slack of thewarp threads will have been taken up and the drop wires will have beenraised so that the bars 35'may oscillate freely in the wide lowerportions of the openings in th wires.

So long as the bars 35 are held from oscillation, the knock-off lever 42will be intermittently actuated to move the latch 26 away from the latchplate 29 in an effort to stop the-machine, but as the latch is at thisvtimein a partially raised or inoperative position, such action by theknock-off lever is immaterial.

Having thus described my invention and the operation thereof, I do notwish to be limited to the details herein disclosed other wise than asset forth in the claims, but what I claim is 1. In a warper, drivingmechanism, controlling devices therefor, a warp stop m0- tion includinga plurality of drop wires and regularly moved detector members extendingthrough said drop wires and having an angular oscillating detectingmovement, means positioned by said controlling devices and effective tolock said detector members from such oscillating movement when saidwarper is stopped, and a lost motion connection between said lockingmeans and said controlling devices, whereby said members will remainlooked as the machine is thereafter started at relativel slow speed.

2. In a warper, driving mechanism, a warp stop motion comprising aplurality of drop wires, detector members extending therethrough, andmeans engaging said detector members to prevent said members frombinding said drop wires when the machine is stopped and thereafter untilthe driving mechanism is substantially restored to' full operativeposition.

3. In a warper, driving mechanism, controlling devices therefor, a warpstop motion comprising a plurality of drop wires, detector members ofnon-circular cross section associated therewith, and a forked lookingbar movable by said controlling devices to frictionally engage adetector member and hold the. same from movement until positively movedfrom engagement therewith.

4. In a warper, driving mechanism, controlling devices therefor, a Warpstop motion comprising a plurality of drop Wires, detector members ofnon-circular cross section associated therewith, and a forked lock- 5ing bar movable by said controlling devices to frictionally engage adetector member and hold the same from movement until positively movedfrom engagement therewith, said locking bar having a lost motionconnection with said controlling devices.

In testimony whereof I have hereunto affixed my signature.

DAVID A. FORTUNE.

